Nut-lock.



G. B YAR.

NUT LOCK.

APPLICATION FILED A 111111111 8. 929,827. Patented Aug. 3, 190$.

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GEORGE BRYAR, OF BRIGHTON, MASSACHUSETTS, ASSIGNOR OF ONE-THIRD TOSTUART M. ROBSON AND ONE-THIRD TO ARTHUR O. HARVEY, BOTH OF SPRINGFIELD.MASSA- CHUSETTS, AND ONE-THIRD TO FRANKLIN PLAYTER, OF BOSTON,MASSACHUSETTS.

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Specification or" Letters Patent.

Application area April is, 1908.

T 0 all whom it may concern:

Be it known that I, GEORGE BRYAR, a citizen of the United States ofAmerica, residing at Brighton, in the county of Suffolk and State ofMassachusetts, have invented a new and useful Improvement in a Nut-Lock, of which the following is a specification.

This invention is an improved construction of nut lock, the object beingto provide an exceedingly simple and inexpensive construction of nutlock and which can be quickly and easily applied and prove highlyefhcient.

Another object of the invention is to provide a nut lock which isapplied after the nut has been screwed home and which will bind againstthe said nut and prevent it working loose.

\Vith these objects in view, my invention consists essentially inproviding a thin washer plate having an opening larger than thecross-section of the bolt, said washerplate having an inwardlyprojecting tongue or finger at one side of the opening, said fingerbeing adapted to engage the thread of the bolt and hold the oppositeside of the washer opening also in engagement with the bolt, said washerbeing held at an inclination to the face of the nut against which it iscaused to bear, thereby firmly binding the said nut upon the bolt.

The invention consists also in certain details, hereinafter fullydescribed and pointed out in the claims.

In the drawing forming a part of this specification :F igure 1 is a sideelevation of my improved construction of nut lock. Fig. 2 is a verticalsectional view of the same, the bolt being shown in elevation. Fig. 3 isa top plan view of the same. Fig. 4': is a detail perspective view ofthe locking washer and Fig. 5 is an enlarged sectional view, a portionof the bolt being shown in elevation, said view illustrating the obliqueposition of the washer with reference to the bolt.

Referring to the drawings A indicates the bolt and B the nut, both beingof the usual or any approved construction. The nut is ordinarily screweddown tight upon the bolt and the locking washer C is then placed uponthe bolt and turned down until it firmly binds against the face of thenut upon one side, and when so brought into engagement with the face ofthe nut, the nut, bolt and washer are all securely bound together andall tendency of the nut to work loose arrested, the action of thelocking washer depending entirely upon the fact that it extends at anoblique angle with reference to both the bolt and the nut, and bindstightly upon the thread of the bolt and also against the face of thenut.

The locking washer C is preferably made substantially the same size asthe nut and also of the same shape, although it will be understood thatthe washer can be any shape desired. This locking washer G is a thinplate preferably of hardened steel, and has an opening C essentiallyoval or elliptical in shape, and a finger or tongue C projects inwardlyfrom one edge of said opening, said finger or tongue being in alinementwith LhQ major axis of the opening, and the inner end of this finger ortongue is preferably beveled as shown at C in order to engage thethreads of the bolt and the opposite edge C of th opening is alsobeveled for the same reason.

in operation the locking washer is placed upon the bolt and turned downuntil it contacts with the nut as shown in Figs. 1 and 2, and inasmuchas one side of the washer opening engages the bolt upon one side, andthe finger or tongue engages the bolt at a diametrically opposite pointit is obvious that owing to the pitch of the screw or thread, thelocking washer will always be held at an oblique angle, and by turningthe said washer down firmly, the bolt and nut and washer will besecurely locked, as the resiliency of the finger or tongue will alwayshold said tongue firmly bound against the bolt and this will also holdthe opposite edge firmly in contact with the opposite side of the bolt,and all tendency of the nut to loosen will be avoided.

Having thus fully described 111 7 invention, what I claim as new anddesire to secure by Letters Patent is 1. A locking washer consisting ofa thin plate of metal having an opening and provided with a finger atone side of said open ing' in the same plane as the washer, the innerend of said finger being adapted to engage the threads of a bolt wherebysaid washer will be held into engagement with the outer face of the nutto be locked at an oblique angle.

2. A locking Washer consisting of a thin fiat plate of metal having anopening, and an inwardly projecting finger arranged at one side of saldopening in the same plane as the washer, the inner end of said fingerbeing beveled for engagement with the thread of a bolt, the opposingedge of the opening being also beveled, whereby said Washer will be heldon the bolt at an oblique angle.

3. A locking washer comprising a plate] provided with a substantiallyoval-shaped opening having an inwardly projecting finger at one end ofthe opening normally held in the same plane as the Washer, the inner endof said finger and the opposite edge of said opening being beveled andadapted to engage the threads of a bolt and be held against the face ofthe nut at their inclination.

GEORGE BRYAR. lVitnesses Gnonen W. SIAs, E. C- BULLEN.

